Radial setting gauge



Aug. 30,1927; 1,641,114

L. B. CARL SON RADIAL SETTING GAUGE 87 Filed Dec. 15, 1923 Patented Aug. 30, 1927;

' -ZUNIT D; STATES PATENT emee 'LEWIs B. CARLSON, or BosToiv, MASSACHUSETTS, AssIeNoR To s. A..woons MAonmn COMPANY; OF SOUTH BOSTON, MAssAcHUsETTs, conroRATIoN- on MASSACHU- RADIAL SETTING GAUGE,

-A iieetien med December 15,1923. Serial No. eesogm.

My present invention relates to gauges, and more particularly to, a radial setting gauge for cutterhead knives, a In Patent No. 846,723; grantedMarch 12, 1907, to Charles W. H. Blood, therefis described and claimed animproved radial setting gaugewfor cutterhead knives in which extreme accuracy. in the setting of the knives is/obtained the principle under which'such patent operates being to preliminarilyarrange the cutting :knives outward to.v a greater" extent than they will be ultimately set and thennioveithe gauge into engagement with the. cutting ed 'e of such knives which forces; them inward. with respect to the cutterhead toga; predetermined distancefrom the center ofrotatio'n' of such cutter heade Themeans by which this accurate setting is performed is 1 arranged on a radially gextending frame which accurately; adjusts 'the cutting .kfniv'es'to the same radial distancewfrom the center of the cutterheadirre V ,spe'ctive} of the accuracyjo'f: the faces ofjthe L cutterhead and; of; the position which x the edges of theknife, occupy with relation to practically eachsize of cutterhead. employed.

This necessitated a multiplicity of gauges which was objectionable,particularly ina relatively small shop because of the expense involved} In u my present invent-ion I have --q-'-.provided means for quickly and accurately setting the cuttingedgeof; akni-fe on a,cu-t- ,terhead in predetermined and accurate relation to the center of rotation of the cutterhead and myjdevice is capable of application .to a plurality of different sizes of cutterheads. A t In accomplishing my object, I provide an auxiliary rotatable frame-mounted on the adjusting frame, which auxiliary. 'rotatabge bear; onthe shaft 11 at each end of frame maybe swung about its pivot point to allow fordifferent sizes of cutting-circle cut out'by the knives inarcutterheadl, 4

7 In the accompanying drawings illustratmg the preferred embodiment of my invenition', v r .1

Fig. 1 is a view in end elevation of a cutterhead'showlng my setting gauge applied thereto, the carrying shaft therefor being shown in section, and a V v -4 v E g. 2 1s ga plan view of Fig. 1.-

-, --Referring to the drawings, 10 designates acutterheadsecured to a-shaft, 11, thecuttterhead being approximately square in end elevation, asshown in Fig. 1, and in each face of the cutter head is formed a I groove 12 gthat extends'throughout the length of the'head; ,S-ecur'edto each'face of the cutterhead are 'knives- 13, such knives bein secured by T; boltsfl l that fit in thea'l grooves 12 andwby ,nuts 15'that' screw onto such, T bolts. The knives 13 are, provided withslots1-16 which permit adjustment oftheknives1f8 withrespect'to'the faces of the-cutterhead.

: Numeral-19 designates armsspacedapart from each; other andsecured at one end to a rod or shaftQO, These arms .19 at the end L remote fron 'their connectionwiththe shaft 120 are curved and the under edges of-the curved port on are provided with abearing surface, 22;}1I1Clffi1) their extreme end; are drilled and tapped to allow passage therethroughof anadjusting screw 23,-th-e arm .19 being provided with graduations 24 *Which, with the adjusting screw 23, forms practically a micrometer adjusting arrange- .ment for the arms. The length of theshaft {ZO'is suchthat the be'aring'surfaces 22 and the inner end, of the. adjustingserew 23 the CutterheadlO. ;The arms 19 and shaftQO constitute a framehaving means for, supporting itself onfiashaftor other device.

Each of the arms 19 is p'rovidedon its 7 top edge with a slot 25 and in the arms V19 transversely of theslot 25 are arranged a pluralityof perforations 26 in Which may be inserted a pin 27. 1 Passing through each of the slots. 25 is a spring member member is provided with a downwardly extending yielding portion 29 that engages with the shaft 11 and is also provided with a portion 30 that extends outward pa 'allel to the arm 19. Provided on the arm 19 is a lip 31 and under which lip the end 'lllef the spring engages, as clearly shown in the drawings. The yielding portion 29 of the spring cooperates with the bearing surface 22 and with the inner end of the adjusting screw 23 to form practi cally a three point suspension for each of thearms 1 9 and acts to quickly, positively, anth accurately center the framework com prised of the arms 19 and shaft on the shaft l l and with relation to the cutter liead 101 The shaft 20 witlr the arms" 19 and the parts carried by the latter const-i tube the main frame of the gauge.

Rotatably mounted on the shaft QOadj'acent each of the anus 19; s clearly shown in Fig. 2, is a bearing iii-1e52, the end of such arm adjacent the shaft 20 being provided witltlugs all adapted to receive a bolt 34 and by means of which the arms 32 may be securely clamped hr adjusted position on such shaft .20. The end of the arms 32 remote fronrthe lugs ldare drilledto receive a shaft 3.5,which shaft is secured to the arms 32 by pins 36 and the shaft 35 is arranged to lie parallel with the shaft 20 andg-bc reuse of the means providedfor holding the arms19 on the shaft 11 such shaft 35 1s maintained parallel to the shaft 11. Mounted for rotatable and slidable movement on theshaft 85 are devices 37 having an are surface concentric to the shaft this surfacebeing of sufficient length for the purposeto be hereinafter described, and preferably such devices have the form of a complete roll or wheel. The rolls lT may beslid alongthe shaft 35 for different widths of knives 13 01 to test the accuracy of grinding of any knife. The bearing arms 32' and shaft 85 constitute an auxiliary frame.

In operating my improved deviceg the operator grasps in his hands thcopposite ends of the arms 19 and releases the ends of the s iriings to permit the yielding ends 29 thereof tobemovedfromthe shaft 1 1 at the opposite ends ofthecutter head lOi Hetlien dro ps the arms so as to bring the bear-ing sur aces 2B and the ends of the adjusting screws 23 into engagement with the shaft 11 and depresses the ends 30 of thespring so as to force the yielding portion 29'tl1ercofint o engagement with the shaft 11. The endsSO are brought under the lips on the ends of the ears81. The bearing surfaces22, adj usting screws 2%), and yielding spring ends 29 hold the device accurately in position with respect tothe cutterhcad 10 andon the shaft 11. Should it become necessary to adjust the device, this maybedoneby means of the adjusting screws 23. The bolts 34 are eanne slacked off to permit rotation of the frame comprised of the arms 32 and shaft 35 into position to bring the rolls 3? into gauging position with the knives 1 3011 the cutterhead 10, after which the bolts are tightened up in the lugs 33. The knives 13 to be adjusted on the cutterhead 10 are moved on the faces of the cutter head 10 to such a degree as to have'their cutting edge extend radially outward from the center of rotation of the shaft 11 a; greater distance than they will have when in proper position and the knives 13 are loosely held' in suclrvpositiolr by means of the? bolts 1'4 andnuts 161 The operator new grasps the arms 19and rotates theentire device about theshaft 11, bringingthe peripheral face of the members 37 intoeng2]g ;cment witlrthe bevel of the cutting edge of the lilllVQS 18 and this action-forces the cuttil'ig edge of such loosely held: kni ves radially inwaird with respect to* the center of the shaft 11'. The knives willbe properly positioned when the contact points between the same and tliemeinbens 3? ai'edn the plane of the ascent the shafts 35* and 11. After the setting}; operation, the nuts flfi are screwed onto the T bolts 14 to clamp the cutting knives 13 in adjusted positioni It being possible to swing the frameworkcomprised of t liearnls 32 and shaft 35" about the slla ftQO as" a center, it will be apparent that my device is capable of use in connection with a" large nuniber of different sizeth cutting heads 10 and that accurate adjustment of the knives on any sized cutterhead within the capacity of the device isquickly, positively, and accimitely performed,

\Vhile I have necessarily shown and described the preferred embodiment of my invention somewhat in detail it is to be understood that 11 may vary the sizeyshapey and arrangement of parts within wide limits without departing from the spirit of the invention;

Having thus described my invention; what I claim as new is:

1. 2c setting gauge for cutter liead knives,

said gauge comprising a main frame having three-point suspension means whereby the frame is adapted to be rotat-ably in'ountedon the cutterhcad shaft, an auxiliary frame mounted on said main frame for adjustment relative thereto about air axis parallel to said shaftand having membersaffording edgeengaging surfaces which are adapted to be movedtowards or fromthe axis ofsaidslitrft as a result of such adjustment, the entire gaugebeing movable about the axis of the shaft, by virtue of the three-point suspension, for engaging and moving radially a cutting edge. a y

2. it setting gauge for cutter head knives,

said gauge comprising a main frame; means for yieldingly and retatably holding; said frame in position on the shaft of the cutter head, an auxiliary frame mounted on said whereby the cutting edge of a knife on the main frame for adjustment about an axis cutter head will be moved radially inward parallel to said shaft, edge-engaging devices with respect to the center of said shaft. 10 carried by said auxiliary frame and adjust- In testimony whereof, I have signed my 5 able therewith so as to vary their distance name to this specification from the cutter head shaft, the entire gauge being rotatable about the axisof said shaft, LEWIS B. CARLSON. 

